This time, Couric is headed to ABC, where she'll be filling in for Good Morning America's Robin Roberts, who is on vacation for the week.

The former CBS Evening News anchor has kept a low-profile since leaving the broadcast in May 2011, after nearly five years with the network. Still, after her time off, she seems excited to get back in the swing of things.

"Thanks for all the kind words about my guest gig on @GMA," She tweeted on Thursday, addressing the show's co-anchor, George Stephanopoulos. "I'll be keeping Robin's seat warm next week--Can't wait, George!"

Katie Couric joined Today as a political correspondent in 1989, and became a permanent co-anchor for the program in 1991. After fifteen years alongside cohost Matt Lauer, she left Today in 2006.